东濮凹陷的各向异性叠前深度偏移方法
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摘要
东濮凹陷属断陷型盆地,沉积环境多变、断块破碎、构造复杂,局部构造主要受断层控制,断层两侧同一时代地层由于埋深不同,导致在大断层附近存在较大的速度横向变化.而时间偏移不能解决速度横向变化的问题,东濮凹陷今后构造勘探的主要目标是小断块和小幅度构造,所以在本区中应用了各向异性叠前深度偏移,在叠前深度偏移基础上,把时间偏移道集的高密度速度分析结果与声波测井资料相结合,形成一套各向异性参数求取方法,通过基于各向异性的叠前深度偏移改善了地震与钻井的吻合度.
The Dongpu depression is a faulted basin with versatile depositional environment,broken fault-blocks and complicated structures.Its local structure is controlled by faults.There are major lateral velocity alternations because of different buried depths of contemporaneous strata in the two sides of faults.But time migration is unable to work out this problem,so anisotropic pre-stack depth migration has been applied to this area,and high density velocity analysis is ombined with acoustic logging data.The results show coincidence of seismic and drilling with anisotropy PSDM.
The Dongpu depression is a faulted basin with versatile depositional environment,broken fault-blocks and complicated structures.Its local structure is controlled by faults.There are major lateral velocity alternations because of different buried depths of contemporaneous strata in the two sides of faults.But time migration is unable to work out this problem,so anisotropic pre-stack depth migration has been applied to this area,and high density velocity analysis is ombined with acoustic logging data.The results show coincidence of seismic and drilling with anisotropy PSDM.
引文
[1] 赵景霞,张叔伦,孙沛勇,倪逸.三维并行合成震源记录叠前深度偏移[J].地球物理学报,2006,49(1) :205～233． Zhao J X,Zhang S L,Sun P Y,Ni Y.3-D parallel prestack depth migration of synthetic source records[J].Chinese J.Geophys.(in Chinese),2006,49(1) : 205～233．
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[6] 李素华,王云专,范兴才,卢齐军.模型正演技术在兴城地区叠前深度偏移中的应用[J].地球物理学进展,2008,23(4) : 1216～1222。Li S H,Wang Y Z,Fan X C,Lu Q J.Application of forward modeling technique pre-stack depth migration in Xingcheng area[J].Progress in Geophysics(in Chinese),2008,23(4) :1216～1222．
[7] 董春晖.共聚焦点叠前深度偏移速度估计方法研究[J].地球物理学进展,2008,23(6) :1866～1871． Dong C H.Prestack-Depth-Migration velocity analysis method based on the CFP method [J].Progress in Geophysics(in Chinese),2008,23(6) :1866～1871．
[8] 胡渤,孙志信,史军.叠前深度偏移技术在埕北30潜山的应用[J].海洋石油,2005,25(1) :28～31． Hu B,Sun Z X,Shi J.Application of prestack depth migration in Chengbei 30 area[J].Offshore Oil.2005,25(1) :28～31．
[2] 刘定进,印兴耀.傅里叶有限差分法保幅叠前深度偏移方法[J].地球物理学报,2007,50(1) :268～276． Liu D J,Yin X Y.A method of Fourier finite-difference preserved-amplitude prestack depth migration[J].Chinese J.Geophys.(in Chinese),2007,50(1) : 268～276．
[3] 刘礼农,陈小宏,张剑锋,刘洪.轴对称各向异性介质波动方程深度偏移的对称非平稳相移方法[J].地球物理学报,2007,50(1) :277～284． Liu L N,Chen X H,Zhang J F,Liu H.Wave equation depth migration with symmetric non-stationary phase shift method in axi-symmetrical anisotropic media[J].Chinese J.Geophys.(in Chinese),2007,50(1) : 277～284．
[4] 刘定进,印兴耀.共炮检距道集波动方程保幅叠前深度偏移方法[J].地球物理学进展,2007,22(2) :492～501． Liu D J,Yin X Y.The method of wave equation preservedamplitude prestack depth migration for common offset gathers[J]. Progress in Geophysics(in Chinese),2007,22(2) : 492～501．
[5] 叶月明,李振春,仝兆岐,张辉,徐秀刚,李栋.双复杂条件下带误差补偿的频率空间域有限差分法叠前深度偏移[J].地球物理学进展,2008,23(1) :136～145． Ye Y M,Li Z C,Tong Z Q,Zhang H,Xu X G,Li D.Xwfd prestack depth migration based on dual-complexity with error compensation correction [J].Progress in Geophysics(in Chinese),2008,23(1) :136～145．
[6] 李素华,王云专,范兴才,卢齐军.模型正演技术在兴城地区叠前深度偏移中的应用[J].地球物理学进展,2008,23(4) : 1216～1222。Li S H,Wang Y Z,Fan X C,Lu Q J.Application of forward modeling technique pre-stack depth migration in Xingcheng area[J].Progress in Geophysics(in Chinese),2008,23(4) :1216～1222．
[7] 董春晖.共聚焦点叠前深度偏移速度估计方法研究[J].地球物理学进展,2008,23(6) :1866～1871． Dong C H.Prestack-Depth-Migration velocity analysis method based on the CFP method [J].Progress in Geophysics(in Chinese),2008,23(6) :1866～1871．
[8] 胡渤,孙志信,史军.叠前深度偏移技术在埕北30潜山的应用[J].海洋石油,2005,25(1) :28～31． Hu B,Sun Z X,Shi J.Application of prestack depth migration in Chengbei 30 area[J].Offshore Oil.2005,25(1) :28～31．
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